Almost all of them have European surnames, but only ~20% of them have a European ancestor. If you are white, chances are good one of your ancestors came from France, or used a French surname to fool the authorities.
1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern.  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere.
1.DC motors are direct current motors while ac motors are alternating current motors. 2.DC motors generally characterize a continual and standard current flow while AC motors are used in variant situations irrespective of the quality of the current flow.